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Proceedings Paper

Photorefractive phased-array-radar processor dynamics
Author(s): Anthony W. Sarto; Robert T. Weverka; Kelvin H. Wagner
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Paper Abstract

We derive, and experimentally verify the dynamic and steady state behavior of a high- bandwidth, large degree-of-freedom adaptive phased-array-radar optical processor. The large number of adaptive weights necessary for processing in a complex radar signal environment with large arrays are computed in the form of dynamic three-dimensional volume holograms in a photorefractive crystal. The processor computes the angles-of-arrival of multiple interfering narrowband radar jammers and adaptively steers nulls in the antenna pattern in order to extinguish the jammers. The theoretical model developed provides analytical expressions relating system parameters such as feedback gain and phase to suppression depth and convergence rates for multiple narrowband jammers of arbitrary spatial profile. We have obtained experimental verification of the system behavior showing excellent agreement with the theoretical model and experimental jammer suppression as high as -35 dB.

Paper Details

Date Published: 9 November 1993
PDF: 15 pages
Proc. SPIE 2026, Photonics for Processors, Neural Networks, and Memories, (9 November 1993); doi: 10.1117/12.163620
Show Author Affiliations
Anthony W. Sarto, Univ. of Colorado/Boulder (United States)
Robert T. Weverka, Univ. of Colorado/Boulder (United States)
Kelvin H. Wagner, Univ. of Colorado/Boulder (United States)


Published in SPIE Proceedings Vol. 2026:
Photonics for Processors, Neural Networks, and Memories
Stephen T. Kowel; William J. Miceli; Joseph L. Horner; Bahram Javidi; Stephen T. Kowel; William J. Miceli, Editor(s)

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